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Line 5: <big><big> u<sub>2</sub> = 2 </big></big> we define the n-th Ulam number u<sub>n</sub> as the number ~~such~~ that is greater than u<sub>n-1</sub> and uniquely written as a sum of two different Ulam numbers u<sub>i (<n)</sub> and u<sub>j (<n)</sub>. ;Task:

Ulam numbers: Difference between revisions

Ulam numbers (view source)